IF you would like to convert from SU carbs, this is a 2 stage downdraft Weber carb & manifold. Mildy polished aluminum manifold. This was taken off a running Amazon many moons ago and is a Made in Italy carb with manual choke. I have run it through my ultrasonic cleaner a couple of times. It will need a new base gasket (readily available). These kits are about $600 USD new, plus shipping, and are the Made in Spain carb. I have decided to go a different route with my 122S so it is no longer needed.